Trying to run React app without running npm install first

Running a React app without executing npm install first will likely result in errors because the app depends on external libraries listed in package.json. These libraries are installed in the node_modules/ directory, and without them, the app won’t run properly.

Common Issues You’ll Face:

1. Module Not Found Errors:
   Example: Error: Cannot find module 'react'
2. Missing Dependencies:
   If you’re using features from libraries like react-router or axios, they won’t be available.
3. Build Failures:
   If you’re trying to build the project with npm run build, you’ll get errors due to missing packages.

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How to Fix:

1. Run: npm install This will install all dependencies listed in package.json.
2. After installation, start the app: npm start

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Quick Tip (if you’re in a hurry):

If you’ve cloned a project and don’t want to manually install dependencies:

npm ci

This installs exactly what’s listed in package-lock.json, ensuring consistency.